With the holidays "looming" think any good sales will be after tax time, at least in the US.
Problem, if you want to call it that, is feeling out what the "outside" user base on eBay is looking for. Granted, a Nemesis isn't all that valuable, but time spent in a proper installation is a tidy sum.
Unless I over paid (retail, not someone's opinion of cost) think my e was close to $500 all said and done. Add the Xylinx USB programmer, fearful sweat, prolly upwards $600. That was with the discipline to ensure cash was on hand throughout the waiting period.
A grand isn't anything today, for me, maybe you, yes. For electronic users everywhere looking to catch the retro wave, don't have the desire to set up a Falcon workstation, as they admittedly need, to retrofit hardware one listed on eBay here is a good option.
Nearly all the threads in atari-forum usually dive into a technical discussion rather quickly, be it hardware, software, or electronics tools.
It wouldn't be hard for a bidder to anonymously drop in here to find a user and machine history. Good feed back on eBay helps.
Being as this Falcon isn't being flipped, what it actually is described well, and time tested upgrade, the buyer is just paying in lump sum what they would have over time.
Why they don't come "onboard" is a question for the masses

Don't think I've ever been put into "time out", and feel tolerated by at least 3 or 4 members, so I stick around

Another way to look at it, the new owner will certainly want to upgrade further down the road. Haven't followed the SuperVidel thread to know where that is possibly going. A combined card would be nice, but not for those of us just wanting the video upgrade.
If this were Antique Roadshow, I'd put the insured value of the CT63e at $800, and the value of the Falcon at $1000. If it were professionally restored (they always say that) with the retro-brite process, completely disassembled and reassembled, the insured value would be $2200
The difference, it is an auction after all.